(原始内容存档于2018-08-02). ...20 new Bombardier CRJ900 aircraft..." "...aircraft will have the ATMOSPHÈRE cabin with a 70-seat, dual-class configuration... 存档副本
ISBN 978-0-87338-698-2. Averill, R.D. A systems analysis of a regenerative cabin atmosphere control system. Langley Research Center. NASA. [November 2, 2013]